Abstract
A lifting stud from a stator frame broke during assembly operations. The part was hot rolled from a 50 W grade low-carbon steel (according to the Canadian standard CSA G40.21-04), which is the equivalent of AISI 1022 grade. Complete metallurgical characterization of the material showed that the chemical and mechanical requirements of the aforementioned standard were met. Moreover, the tensile testing showed that the material had good ductility. Fractographic investigation, both at the macroscale and microscale levels, indicated that the lifting stud failed under bending overload, in a brittle mode. It was found that brittle behavior of the ductile material was caused by the sudden application of the load combined with triaxial stresses promoted by the threaded geometry.
Similar content being viewed by others
References
Shigley, J.E., Mischke, C.R., Budynas, R.G.: Mechanical Engineering Design, 7th edn., p. 80. McGraw-Hill (2004)
Heat Treater’s Guide, Standard Practices and Procedures for Steel, 6th edn., p. 41. American Society for Metals (1993)
Principles of Failure Analysis—Types of Failure and Stress, Course 0335, Lesson 2, pp. 15–16. American Society for Metals (2002)
Principles of Failure Analysis—Types of Failure and Stress, Course 0335, Lesson 2, pp. 6–9. American Society for Metals (2002)
Principles of Failure Analysis—Types of Failure and Stress, Course 0335, Lesson 2, pp. 8–9. American Society for Metals (2002)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Banuta, M., Tarquini, I. & Gauvin, B. Brittle Fracture of a Lifting Stud During Assembly Operations. J Fail. Anal. and Preven. 9, 208–212 (2009). https://doi.org/10.1007/s11668-009-9237-y
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11668-009-9237-y